<template>
  <div class="app-container">
    <!--表单-->
    <el-form :inline="true" class="demo-form-inline">
      <el-form-item>
        <el-select v-model="searchObj.type" clearable placeholder="请选择">
          <el-option label="学员登录数统计" value="login_num" />
          <el-option label="学员注册数统计" value="register_num" />
          <el-option label="课程播放数统计" value="video_view_num" />
          <el-option label="每日课程数统计" value="course_num" />
        </el-select>
      </el-form-item>

      <el-form-item>
        <el-date-picker
          v-model="searchObj.begin"
          type="date"
          placeholder="选择开始日期"
          value-format="yyyy-MM-dd"
        />
      </el-form-item>
      <el-form-item>
        <el-date-picker
          v-model="searchObj.end"
          type="date"
          placeholder="选择截止日期"
          value-format="yyyy-MM-dd"
        />
      </el-form-item>
      <el-button
        :disabled="btnDisabled"
        type="primary"
        icon="el-icon-search"
        @click="showChart()"
        >查询</el-button
      >
    </el-form>

    <div class="chart-container">
      <div id="chart" class="chart" style="height:500px;width:100%" />
    </div>
  </div>
</template>
<script>
import echarts from "echarts";
import staApi from "@/api/sta";

export default {
  data() {
    return {
      searchObj: {},
      btnDisabled: false,
      xData: [],
      yData: []
    };
  },
  methods: {
    showChart() {
      staApi.getBing(this.searchObj).then(response => {
        //获取横坐标与纵坐标的数据
        this.yData = response.data.list;
        this.xData = response.data.name;
        console.log(this.xData+"xxxx")
        console.log(this.yData+"yyy")
        //调用下面生成图表的方法，改变值
        this.setChart();
      });
    },
    setChart() {
      // 基于准备好的dom，初始化echarts实例
      this.chart = echarts.init(document.getElementById("chart"));
      // console.log(this.chart)

      // 指定图表的配置项和数据
      var option = {
        tooltip: {
          trigger: "item",
          formatter: "{a} <br/>{b}: {c} ({d}%)"
        },
        legend: {
          orient: "vertical",
          left: 10,
          data: this.xData
        },
        series: [
          {
            name: "访问来源",
            type: "pie",
            radius: ["50%", "70%"],
            avoidLabelOverlap: false,
            label: {
              show: false,
              position: "center"
            },
            emphasis: {
              label: {
                show: true,
                fontSize: "30",
                fontWeight: "bold"
              }
            },
            labelLine: {
              show: false
            },
            data: this.yData
          }
        ]
      };

      this.chart.setOption(option);
    }
  }
};
</script>
